عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TLpq304346135
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
The occurrence of fungi in Kansas corn and extrusion processing to reduce fumonisin B(1) and hydrolyzed fumonisin B(1) in alkali-cooked corn flour
نام عام مواد
[Thesis]
نام نخستين پديدآور
M. O. Cortez Rocha
نام ساير پديدآوران
C. Reed
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
Kansas State University
تاریخ نشرو بخش و غیره
1997
مشخصات ظاهری
نام خاص و کميت اثر
141
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
Kansas State University
امتياز متن
1997
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
A total of 410 samples of 1995 corn from Kansas were analyzed for Fusarium moniliforme. One-hundred kernels of each were plated on Malt Salt Agar (MS6T) and incubated for 7 days at room temperature (20-24C). The type of fungal colonies present on each grain were identified and recorded. To distinguish Fusarium species, subcultures were grown on carnation leaf agar plates and incubated for 14 to 21 days at room temperature. Colony morphology, morphology of the conidia and conidiophores were compared for identification and confirmation to species. Fumonisin B level on the samples were determined using the immunoaffinity method (Fumonitest) from VICAM. Samples from dryland counties were highly infected by molds. Variety, cropping system (Dryland and Irrigated), and location significantly affected the level of infection. Among field fungi, Fusarium spp. and Acremonium spp. were most prevalent and widespread. Aspergillus species observed included A. flavus, A. niger, A. glaucus, and A. clavatus. F. moniliforme was the most abundant and frequently isolated Fusarium species. Samples of irrigated corn had the highest percentages of F. moniliforme. The rate of infection varied significantly (P usd\leusd 0.05) by location and variety. FB analysis showed differences between cropping systems, locations, and varieties. There was no correlation between FB level and the level of kernels invaded by of F. moniliforme. In other experiments sound yellow corn (US No. 2) was mixed with cultured, fumonisin containing corn to obtain a contamination level of 250 ppm of FB, then alkali-cooked to produce hydrolyzed fumonisin B. Alkali-cooked corn was subjected to extrusion at 170C using four different moisture contents (24, 27, 30, and 33%) and two circular dies (tapered and angular). Levels of FB and HFB in the extruded products were determined using High Performance Liquid Chromatography (HPLC) with ortho-phtaldialdehyde (OPA) derivatives. The steep water from the alkali-cooking process removed 37% of the initial fumonisin content from contaminated corn. The fumonisin remaining in the corn was present mainly as HFB form. Extrusion reduced the recoverable HFB content by as much as to 67%, and FB was not detected in the extruded product. Moisture content of the material to be extruded and the die geometry affected the reduction of recoverable fumonisin.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Acremonium
موضوع مستند نشده
Aspergillus
موضوع مستند نشده
Biological sciences
موضوع مستند نشده
Food science
موضوع مستند نشده
Fusarium moniliforme
موضوع مستند نشده
Plant pathology
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
C. Reed
مستند نام اشخاص تاييد نشده
M. O. Cortez Rocha
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
